This is a v2 of:

https://listman.redhat.com/archives/libvir-list/2023-June/240351.html

Hopefully, I've implemented all Dan's suggestions.

Michal Prívozník (5):
  virfile: Introduce virCloseRange()
  virfile: Introduce virCloseFrom()
  vircommand: Unify mass FD closing
  vircommand: Introduce virCommandMassCloseRange()
  src: Detect close_range syscall during virGlobalInit()

 src/libvirt.c            |   4 +
 src/libvirt_private.syms |   4 +
 src/util/vircommand.c    | 160 ++++++++++++++++++++++++---------------
 src/util/virfile.c       | 110 +++++++++++++++++++++++++++
 src/util/virfile.h       |   5 ++
 tests/commandtest.c      |   2 +
 6 files changed, 222 insertions(+), 63 deletions(-)